Stop-casting.



II II! 'I;

G. A. JOHNSON.-

STOP CASTING.

APPLICATION HLED SEPT. 20. mm.

Patented Mar. 19, 1918.

IN VEN TOR. 5201:46 Avg/2.1601; BY 9 r H: ATTORNEY UNITED STATES PATENT OFFICE.

GEORGE A. :romvson, or orzroaeo, rumors ASSSIGNOR T0 WILLIAM H. MINER, or

CHAZY, NEW YORK.

To all whom it may concern:

Be it known that I, GEORGE A. JOHNSON, a citizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented a certain new and useful Improvement in Stop-Castings, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in stop castings.

Objects of the invention are to provide a stop casting for draft riggings wherein the casting is of maximum strength for a unit of weight; wherein the casting may bemade free from casting and annealing strains; which obviates the use of cores in the casting operation; wherein the casting is provided withhollow stops without the necessity of horizontally extending strengthening flanges therewithin to thus facilitate the molding operation; and wherein the casting is provided with large bearing and wearing surfaces.

The invention furthermore consists in the improvements in the parts and devices and in the novel combinations of the parts and devices herein shown, described and claimed.

in the drawing form'ng a part of this specification, Figure 1 is a side elevation of an improved stop casting embodying my invention. Figs. 2 and 3 are horizontal sectional views taken on; the lines 22 and 3 3, respectively, of Fig. 1. And Figs. 4, 5, 6 and 7 are vertical sectional views taken on the lines 4tl, 55, 6-6 and 77, respectively, of Fig. 1.

In said drawing, the casting which I have illustrated is of the tandem type and as shown, comprises a webof metal having a series of vertical convolutions A, B, C, D, E, F, G, H, and I forming the stops 10, 11, 12, 13, 14, 15, 16 and 17 and the follower receiving recesses thercbetween. It will be noted that each of the vertical convolutions A, C, E, G and I are open to the back of the casting and the remaining convolutions B, D, F and H, open to the front or inner face of the casting. Said convolutions are formed by weaving or bending the metal back and forth, as will be understood from an inspection of Figs. 2 and 3. Intermediate each main and limiting stop, the web of the casting is provided with a pair of Specification of Letters Patent.

Patented Mar. 19, 1918.

Application filed September 20, 1916. Serial It'o. 121,126.

depressions or pockets 1818, the bottoms of which are in the back plane of the casting and form the riveting areas, said pockets being sufliciently enlarged to receive the riveting tool. At the ends the casting is provided with additional riveting areas in the form of depressions 19-19. Intermediate the main stops 10 and 13, and 14 and 17 the web of the casting is provided with a horizontally extending portion 20 to thus form the upper guides for the followers that reciprocate between the stops. horizontal portion 20 the web of the casting is extended in. a general vertical direction, then rearwardly to the back plane of the casting in a horizontal portion 21. Similarly. at the bottom of the casting the web is extended rearwardly to the back plane of the casting, as indicated at 22. By referring to Fig. 2, it will be noted that the center post forming the intermediate main stops 13 and 14. is considerably deeper than either of the end stops and the top portion of the casting is tapered toward either end as indicated at 23--23, to permit the yoke of the draft rigging to swing radially about said center post when the car is passing over curves.

In order to provide great strength in the casting against longitudinal and transverse strains, and at thesame time to retain large bearing nd wearing surfaces both on the outer and transverse faces of the stops and the follower guiding surfaces, the web of the casting is provided with a series of horizontally extending, somewhat shallow flutes 24, 25, 26, 27 and 28. It will be noted that the horizontally xtending flutes 24, 26 and 28 extend throughout the entire length of the casting, both over the outer facesof the stops as ndicated at 29-29, along the vertical faces of the main and limitin stops as indicated at 3030, and across the follower guiding surfaces or bottoms of the vertical convolutions B, D, F and H, as indicated at 31 31. The remaining flutes 25 and 27 also extend across the outer and transverse faces of the stops, but are omitted where the same cross the rivet pockets 18-48. As clearly appears from Figs. 4, 5, 6 and 7, the flutes are in theform of shallow, curved rooves on thevinner face of the casting 311C? thereby leave a maximum wearing flat surface 32 on the inner face of the stops and follower guiding surfaces, and

Above said 4 a maximum bearing area as indicated at 33-33 on the transverse portions of the stops and against which the followers normally bear.

By means of the fiuting above described, in combination with the vertical convolutions, a casting of great strength is obtained without sacrificing the desirable large wearingand bearing area and furthe 'more, the casting is so constructed that the web thereof is of substantially the same thickness throughout its entirety and the casting may be made without the use of cores since there are no undercut surfaces. By maintaining the uniformity of thickness of the web, it is obvious that the casting operation is simplified since all portions of the casting will cool at the same rate, thus minimizing cash ing strains. Similarly in the annealing operation, all portions er the metal can be annealed at the same "rate, thus producing a casting free from the defects conimonly'encountered in devices of this character. in addition to tne foregoin it is obvious that by weaving the metal lnwardly and outwardly in the form of vertical convo'lu-tions, as above described a casting of relatively great thickness is obtained without actually employing any thick sections of metal.

I claim:

1. A stop casting for draft riggings having a web of substantially uniform thickness throughout and provided with a series of vertical convolutions forming the stops and a series of strengthening flutes,

said flutes being arranged horizontally and extending across the faces of the stops.

2. As an article of manufacture, a stop casting having a Web provided with a series of vertical convolutions, alternate convolutions being open to the back of the casting and the remaining convolutions open .to the front thereof, said casting being provided also with a plurality of horizontally extending flutes on the inner face thereof. 7

3. As an article of manufacture, a stop casting having a web provided with a series of vertical convolutions, alternate convol'utions beingopen to the back of the casting and the remaining convolutions open to the front thereof, said casting being provided also with a plurality of horizontally extending flutes on the inner face thereof, some of said flutes extending continuously from end to end of the casting and following the contour of the inner face zthereof throughout.

4. As an article of manufacture, a tandem stop casting having a web of substantially uniform thickness throughout and provided with a series of vertical convolutions forming main and limiting stops, the vertical convolution at the center of the casting forming the intermediate main stops being deeper than the convolutions forming the end main stops, the web of said casting being provided with a plurality of horizontally extending flutes, the latter ex tending across the inner faces of the stops and also across the transverse faces of the stops, the web of the casting being provided also with a series of pockets intermediate the stops to form riveting areas.

In Witness that I claim the foregoing I have hereunto subscribed my name this 18th day of Sept, 1916.

GEORGE a. JOHNSON.

Witnesses:

GoLoIE A. BISHOP, ELIZABETH M. ,Bnrr'r.

=Gep1es of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents,

Washington, I). C. 

